The Honda 15721-Z9L-000 Breather Tube is a genuine OEM component designed for GCV170 and GCV200 vertical shaft engines, as well as HRN216 and HRX217 lawn mowers. As a direct Honda OEM part, it is manufactured to the exact specifications of the original, ensuring a proper fit and consistent performance. Confirm your engine or mower's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and fitment can vary within a model line.
Key Features
- Genuine Honda OEM Construction — manufactured to the original design spec, so the tube seats and routes correctly without trimming or adaptation
- Correct Crankcase Venting — maintains the precise flow path that keeps crankcase pressure balanced, preventing oil consumption and rough running caused by a collapsed or cracked breather tube
- Broad Fitment — covers GCV170 and GCV200 vertical shaft engines, including units fitted to HRN216 and HRX217 lawn mowers
- Serial Number Matters — Honda updates part numbers at production breaks, so cross-check your machine's serial number against the compatibility table to confirm this is the right tube for your unit
The breather tube is part of the engine's crankcase ventilation system. It routes blow-by gases — pressure that escapes past the piston rings into the crankcase — back into the air intake to be burned off cleanly rather than vented to atmosphere. When the tube cracks, collapses, or becomes clogged, crankcase pressure builds unevenly, which can drive oil past seals, cause excessive smoke, or lead to rough idling. Keeping this tube intact is essential to clean, stable engine operation.
Part Details
| Part Number | 15721-Z9L-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Breather Tube |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Mower | HRN216, HRX217 | All |
| Vertical Shaft Engine | GCV170, GCV200 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
